[BakedAlmonds]

Hi, can some explain the terms use for this file?

While looking into the turbineSiting tutorial:
the inlet is:
inlet
{
type atmBoundaryLayerInletVelocity;
#include "include/ABLConditions"
}

and the subsequent ABLConditions file has this:
Uref 10.0;
Zref 20;
zDir (0 0 1);
flowDir (1 0 0);
z0 uniform 0.1;
zGround uniform 935.0;
value $internalField;

I would like to know what does the terms in the ABLConditions file represent.

Many thanks in advance